Wrench.



J.v & M. M. MAHER.

WRENCH.

APPLIOATIONIILED MAY 5, 1911.

Patented Mar.25, 1913.

I Maize/ WITNESSES VVEN 70x5 filMa/zer.

' Y A TTORNE .UNITED STATES PATENT OFFICE.

JAMES MAKER AND MERCHEY M. MAI-IE3, OF EAST LIVERPOOL, OHIO.

WRENCH.

Specification of Letters Patent. Application filed May 5, 1911. SerialNo. 625,153.

Patented Mar. 25, 1913.

To all whom. it may concern:

Be it known'that we, JAMns MAHER and MERCHEY M. MAHER, citizens oft-heUnited States of America, residing at East Liverpool, in the countyof Columbiana and State of Ohio, have invented certain new and usefulImprovements in Wrenches, of which the following is a specification,reference 'behad therein to the accompanying drawslipping and withoutcausing any accidents to the operator of the wrench due to any lostmotion between the jaws of the wrench.

Another object of this invention is to provide a' wrench with anadjustable jaw thatcan be set in engagement with a body and then as thewrench is placed in operation a more positive grip can be pbtained dueto handle or lever of the wrench.

the leverage bf the wrench and the arrangement of the adjustable Afurther objectofthe iiivention'is to provide a wrench ofthe above typeconsisting of comparatively few parts easily and quickly assembled andmaintained in an operatable condition. y

We attain the above objects by 'a mechanical construction that will behereinafter specifically described and then ..'claimed,

and reference will now be had to the draw ing, wherein there areillustratedj' the preferred embodiments of the invention, but it is tobe understood that the'structural elements thereof are susceptible tosuch va-" riations as fall within the scope of the appended claims.

In the drawing -Figure 1 is a side elevation of the wrench partly brokenaway, Fig. 2 is a similar view of the wrenchpart-ly broken away andpartly in section, Fig. 3 is a similar view showing the wrench providedwith attachments whereby it can be used as a pipe wrench, and Flg. 4is ahorizontal sectional view of the wrench.

A wrench inaccordance-with .this1ir-1ven-= aw relatively to the thehandle.

adapted to receive the tongue 8 of a pipe gripping jaw 9, said jawhaving angularly disposed gripping surfaces provided with serrations orteeth 10. The pipe gripping jaw is detachably retained in engagementwith the jaw 5 by a pin 11 arranged transversely of the jaw 5 andextending through an opening 12 provided therefor in the tongue 8. Thefront side of the shank 4 is of an adjustable provided with transverseteeth 13, for a purpose that will presently appear.

Movably arranged in the strap 1 is the upper end of a handle or lever14, the upper endof said handle or lever having a grippingjaw 15 andthis jaw has the grip-' ping surface thereof provided with a socket 16to recelve the tongue 17 of a pipe grip-.

ping 'jaw 18 adapted to cooperate with the jaw 9 in gripping a pipe. Thetongue 17 is detachably retained within the socket 16 by a. pin 19,similar'to the pin 11. The handle or lever '14 within the strap 1 hasthe rear face thereof cut away to provide a recess 20 having the bottomthereof provided with a curved enlargement 21 adapt- .ed to engage in acavity 22 provided therefor. in the front face of a gripping member 23arranged within the recess 20, said member having teeth 24 to engage theteeth 13 of the shank 4.

The upper end of thehandle or lever 14 extends through the strap 1 andis secured therein against longitudinal movement by means of a pin 26extending through openings 27 in the strap and an opening 25 in The pin26 has one end headed as at 28, and has its opposite end provided with adetachable winged knob '29, the head and knob being on the outer sidesof the strap. 1. The portion of the in which extends through the handleis ormed with a cutaway portion providing a flat face 35 whichcorresponds tothe chord of a circle forming the periphery of the pin.opening 25 has one portion of its wall curved in correspondence with theperiphery of the pin, and has that portion adjacent to the enlargement21, extending on a line substam The tially in correspondence'withthedirection of length of the-handle, said line being tangent to a'ndintersecting the line of an arc which would complete the circle of whichthe remaining portion of the wall-of the opening would form a part, thusforming at flat faced wall 25" for the opening 25 against which the'flatface can abut. As

seen .in Fig; 2, when the pin is in a position here the flat face 35 isangular with respect to the fiat face 25 of the opening, the handleish'eld against any movement on the strap'excepting a slight pivotalmovement,-the normal diameter of'the pin extending from wall to wall ofthe opening; when the pin is turned to the position shown in Fig. 3,bringing the face 35 in parallelism with the flat wall 25*, the handlemay *be moved transversely and thus permit member :23 to pass out ".Ofengagement with the teeth of the shank 4, but without permitting arelative longitudinal movement of the handle and strap. As will bereadily understood, a movement of the pin to defaces' 35 and 25iwillcause the handle toreturn to the position shown in Fig. 2 and cause themember 23 to grip the teeth of I 1 the shank. One of the wings 30 of theknob 30 in Fig. 2, it will: be readily understood that the strap ano.shank are practically .locked together against'relative movement,

while the handle. is permitted to have a slight pivotal movement on thepin. By reason of thecontaoting faces of the enlargement 21 and themember 23, such slight pivotal movement of the handle rela- .50

tive to the shank and strap tends to cause the shank to be slightlymoved .in a direc-L tion to cause the jaw 5 to approach the jaw; 15, dueto the pressure placed on the end of the gripping member 23 and thetendency to move'the shank through said member 23, the opposing curvedfaces ofthe enlargement and member 23 providing the necessary movementin this respect. In making the lower wall of the recess 20 inclined,sufficient clearance is provided for I this relative movement of themember 23. What we claim is u 1. 'A wrench embodying a strap, a toothedshank slidably mounted in said strap, a jaw carried by said shank, ahandle having the stroy the parallelism or'contact of. the flat upperend thereof arranged in said strap, a jaw carried by said handle, a pinrotatably mounted in said strap and extending through said handle, and atoothed gripping member arranged in said strap and adapted to be movedinto engagement with said shank-by .amovement of said handle, said pinand handle being complementally formed to nor- 'mally limit the handleand shank to pivotal movements and to permit relative transversemovement of said parts at will independently of the pivotal movements toengage and disengage said member and shank.

2. A wrench embodying a strap, a toothed. shank slidably mounted in saidstrap, a jaw carried by said shank, a handle having the upper endthereof arranged in said strap, a jaw carried by said handle,-a pinrot-atably mounted in said strap and extending through said handle, saidpin and handle being complementally formedto normally limit the handleand shank topivotal movements and permit relative transverse movement ofsaid parts at will independently of the pivotal movements, a toothedgripping member arranged in said strap and adapted to be moved intoengagementwith said shank by,

a movement of said handle, and means car- 'riedby the outer side of saidstrap and adapted to lock said pin in an adjusted position.

3. A wrench embodying a strap, a shank slidably mounted in one end ofsaid strap, a jaw carried by said shank, a handle having the upper endthereof fulcrumed in said strap in a manner to permit relativetransverse movement of handle and strap at will independently of suchpivotal movements, a jaw carried by the upper end of said handle, and agripping member movably mounted in the upper end of said handle withinsaid strap and adapted to be shifted into engage ment with said shankand then to move said shank by a further movement of said handle. 4:.Awrench embodying a strap, a shank slidablymounted-to move in a singleplane in one end of said strap, a jaw carried by said. shank, a handlehaving the upper end thereof fulcrumed in said strapin a manner topermit relative transverse movement of handle and strap at willindependently of such pivotal movements. a jaw carried by the upper endof said handle, a gripping member movably mounted in the upper end ofsaid handle within said strap alid'adapted to be shifted into engagementwith said shank and then to move said shank by a further movement ofsaid handle.

5. In a wrench, a fixed jaw carried by the handle, a movable jaw, asupport for both of mitting transverse movement of said jaw at willindependently of such .pivotal movements, and a block interposed betweenthe shank of the movable jaw and said handle jaw adapted to engage anddisengagethe shank of the movable member tosecure and hold the movablejaw in position, the movements of said block being controlled by thetransverse movements of the handle jaw.

6. In a wrench, a movable jaw, a jaw carried by the handle, a memberadapted to support said jaws, the connection between the handle jaw andsaid member being in the form of a rotatable device extending throughthe handle jaw, the jaw and device being complementally formed tonormally limit relative movement of the member and jaw to pivotalmovements and permit transverse movement of the jaw and member at willindependently of such pivotal movements, and means interposed betweenthe handle jaw and movable jaw for engaging or disengaging the shank ofthe movable jaw, such engagement and disengagement being controlled bythe transverse movement of the handle jaw. Y

7. In a wrench, a movable jaw, a jaw car- ;verse movement of the jaw andmember atv will independently of such pivotal movements, and meansinterposed between the handle jaw and movable jaw for engaging ordisengaging the shank of the movable 13W, such engagement anddisengagement being controlled by the transverse movement I of thehandle jaw,'said device forming a means by which the handle jaw may berocked pivotally with respect to the remainder of the Wrench structure.

In testimony whereof we affix our signa-- tures in the presence of twowitnesses.

JAMEs MAHER.

MERGHEY M. MAHER.

Witnesses i j CLARA RAHE, EDNA HENDERSON.

Copies of this patent may be obtained for five centseaeh, by addressingthe Commissioner of Patent.

Washington, D. C."

